/Engine/Source/Runtime/MessagingCommon/Public/MessageEndpoint.h
Sends a message with fields, attachment and expiration to the specified recipient after a given delay.
template<typename MessageType> void Send ( MessageType * Message, const [TMap](API\Runtime\Core\Containers\TMap)< [FName](API\Runtime\Core\UObject\FName), [FString](API\Runtime\Core\Containers\FString) > Annotations, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IMessageAttachment](API\Runtime\Messaging\IMessageAttachment), ESPMode::ThreadSafe > & Attachment, const [FMessageAddress](API\Runtime\Messaging\FMessageAddress) & Recipient, const [FDateTime](API\Runtime\Core\Misc\FDateTime) & Expiration, const [FTimespan](API\Runtime\Core\Misc\FTimespan) & Delay )